I think I like two patterns more than three patterns, but here are a bunch of three patterns I'd consider successful to further illustrate Stitchy's points
Cropped to emphasize the individual elements and disrupt gestalt perception. Warning: Spoiler! (Click to show)
Since we're on the topics of pattern/texture mixing: Do you gents think that adding another layer increases the variations you can play with without compromising the contrast to solid i.e. overcoats, hats, odd vests?
I guess what has me wondering is the ability to retain multiple solid elements and add more variation at the same time.